Help loss strength

Just checked my weight and im 165lbs a year or 2 ago I was around 120-130lbs. I stooped working for a few months and Just checked if I could still do a one arm push up, and I couldn't do one with my left and my right I had very bad form (twisting my body, foot on the side, it bit like rocky).So I'm planning to maintain my weight and try not to go under 160lbs. So I want get the strength I used to have,I was looking at a progression and im already at the end of the progression. So should i practice static holds and negatives? Also how long do you think it would take for me to be able to do 5 each hand before I could do 8-10 depending when I did it.Also do you know any other moves i should learn currently im learning handstand which can do only with a wall and planche, learning straight arm frogstand. Also im still learning pull ups I have a wardrobe at home which I do pull ups on I can do 4 so far. On a bar could almost 7